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aha/drivers/media/dvb/pt1/va1j5jf8007s.c
Hans Verkuil 289a774bf5 V4L/DVB (13522): valj5jf8007s/t: fix compile warnings 
Trivial fix for these bogus compile warnings:

v4l/va1j5jf8007s.c: In function 'va1j5jf8007s_tune':
v4l/va1j5jf8007s.c:394: warning: 'lock' may be used uninitialized in this function
v4l/va1j5jf8007t.c: In function 'va1j5jf8007t_tune':
v4l/va1j5jf8007t.c:273: warning: 'lock' may be used uninitialized in this function
v4l/va1j5jf8007t.c:273: warning: 'retry' may be used uninitialized in this function

These variables are never used uninitialized, but the compiler couldn't
figure that out unfortunately.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-12-05 18:42:15 -02:00

713 lines
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/*
* ISDB-S driver for VA1J5JF8007
*
* Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
*
* based on pt1dvr - http://pt1dvr.sourceforge.jp/
* by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include "dvb_frontend.h"
#include "va1j5jf8007s.h"
enum va1j5jf8007s_tune_state {
VA1J5JF8007S_IDLE,
VA1J5JF8007S_SET_FREQUENCY_1,
VA1J5JF8007S_SET_FREQUENCY_2,
VA1J5JF8007S_SET_FREQUENCY_3,
VA1J5JF8007S_CHECK_FREQUENCY,
VA1J5JF8007S_SET_MODULATION,
VA1J5JF8007S_CHECK_MODULATION,
VA1J5JF8007S_SET_TS_ID,
VA1J5JF8007S_CHECK_TS_ID,
VA1J5JF8007S_TRACK,
};
struct va1j5jf8007s_state {
const struct va1j5jf8007s_config *config;
struct i2c_adapter *adap;
struct dvb_frontend fe;
enum va1j5jf8007s_tune_state tune_state;
};
static int va1j5jf8007s_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct va1j5jf8007s_state *state;
u8 addr;
int i;
u8 write_buf[1], read_buf[1];
struct i2c_msg msgs[2];
s32 word, x1, x2, x3, x4, x5, y;
state = fe->demodulator_priv;
addr = state->config->demod_address;
word = 0;
for (i = 0; i < 2; i++) {
write_buf[0] = 0xbc + i;
msgs[0].addr = addr;
msgs[0].flags = 0;
msgs[0].len = sizeof(write_buf);
msgs[0].buf = write_buf;
msgs[1].addr = addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = sizeof(read_buf);
msgs[1].buf = read_buf;
if (i2c_transfer(state->adap, msgs, 2) != 2)
return -EREMOTEIO;
word <<= 8;
word |= read_buf[0];
}
word -= 3000;
if (word < 0)
word = 0;
x1 = int_sqrt(word << 16) * ((15625ll << 21) / 1000000);
x2 = (s64)x1 * x1 >> 31;
x3 = (s64)x2 * x1 >> 31;
x4 = (s64)x2 * x2 >> 31;
x5 = (s64)x4 * x1 >> 31;
y = (58857ll << 23) / 1000;
y -= (s64)x1 * ((89565ll << 24) / 1000) >> 30;
y += (s64)x2 * ((88977ll << 24) / 1000) >> 28;
y -= (s64)x3 * ((50259ll << 25) / 1000) >> 27;
y += (s64)x4 * ((14341ll << 27) / 1000) >> 27;
y -= (s64)x5 * ((16346ll << 30) / 10000) >> 28;
*snr = y < 0 ? 0 : y >> 15;
return 0;
}
static int va1j5jf8007s_get_frontend_algo(struct dvb_frontend *fe)
{
return DVBFE_ALGO_HW;
}
static int
va1j5jf8007s_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct va1j5jf8007s_state *state;
state = fe->demodulator_priv;
switch (state->tune_state) {
case VA1J5JF8007S_IDLE:
case VA1J5JF8007S_SET_FREQUENCY_1:
case VA1J5JF8007S_SET_FREQUENCY_2:
case VA1J5JF8007S_SET_FREQUENCY_3:
case VA1J5JF8007S_CHECK_FREQUENCY:
*status = 0;
return 0;
case VA1J5JF8007S_SET_MODULATION:
case VA1J5JF8007S_CHECK_MODULATION:
*status |= FE_HAS_SIGNAL;
return 0;
case VA1J5JF8007S_SET_TS_ID:
case VA1J5JF8007S_CHECK_TS_ID:
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
return 0;
case VA1J5JF8007S_TRACK:
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
return 0;
}
BUG();
}
struct va1j5jf8007s_cb_map {
u32 frequency;
u8 cb;
};
static const struct va1j5jf8007s_cb_map va1j5jf8007s_cb_maps[] = {
{ 986000, 0xb2 },
{ 1072000, 0xd2 },
{ 1154000, 0xe2 },
{ 1291000, 0x20 },
{ 1447000, 0x40 },
{ 1615000, 0x60 },
{ 1791000, 0x80 },
{ 1972000, 0xa0 },
};
static u8 va1j5jf8007s_lookup_cb(u32 frequency)
{
int i;
const struct va1j5jf8007s_cb_map *map;
for (i = 0; i < ARRAY_SIZE(va1j5jf8007s_cb_maps); i++) {
map = &va1j5jf8007s_cb_maps[i];
if (frequency < map->frequency)
return map->cb;
}
return 0xc0;
}
static int va1j5jf8007s_set_frequency_1(struct va1j5jf8007s_state *state)
{
u32 frequency;
u16 word;
u8 buf[6];
struct i2c_msg msg;
frequency = state->fe.dtv_property_cache.frequency;
word = (frequency + 500) / 1000;
if (frequency < 1072000)
word = (word << 1 & ~0x1f) | (word & 0x0f);
buf[0] = 0xfe;
buf[1] = 0xc0;
buf[2] = 0x40 | word >> 8;
buf[3] = word;
buf[4] = 0xe0;
buf[5] = va1j5jf8007s_lookup_cb(frequency);
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
return 0;
}
static int va1j5jf8007s_set_frequency_2(struct va1j5jf8007s_state *state)
{
u8 buf[3];
struct i2c_msg msg;
buf[0] = 0xfe;
buf[1] = 0xc0;
buf[2] = 0xe4;
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
return 0;
}
static int va1j5jf8007s_set_frequency_3(struct va1j5jf8007s_state *state)
{
u32 frequency;
u8 buf[4];
struct i2c_msg msg;
frequency = state->fe.dtv_property_cache.frequency;
buf[0] = 0xfe;
buf[1] = 0xc0;
buf[2] = 0xf4;
buf[3] = va1j5jf8007s_lookup_cb(frequency) | 0x4;
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
return 0;
}
static int
va1j5jf8007s_check_frequency(struct va1j5jf8007s_state *state, int *lock)
{
u8 addr;
u8 write_buf[2], read_buf[1];
struct i2c_msg msgs[2];
addr = state->config->demod_address;
write_buf[0] = 0xfe;
write_buf[1] = 0xc1;
msgs[0].addr = addr;
msgs[0].flags = 0;
msgs[0].len = sizeof(write_buf);
msgs[0].buf = write_buf;
msgs[1].addr = addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = sizeof(read_buf);
msgs[1].buf = read_buf;
if (i2c_transfer(state->adap, msgs, 2) != 2)
return -EREMOTEIO;
*lock = read_buf[0] & 0x40;
return 0;
}
static int va1j5jf8007s_set_modulation(struct va1j5jf8007s_state *state)
{
u8 buf[2];
struct i2c_msg msg;
buf[0] = 0x03;
buf[1] = 0x01;
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
return 0;
}
static int
va1j5jf8007s_check_modulation(struct va1j5jf8007s_state *state, int *lock)
{
u8 addr;
u8 write_buf[1], read_buf[1];
struct i2c_msg msgs[2];
addr = state->config->demod_address;
write_buf[0] = 0xc3;
msgs[0].addr = addr;
msgs[0].flags = 0;
msgs[0].len = sizeof(write_buf);
msgs[0].buf = write_buf;
msgs[1].addr = addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = sizeof(read_buf);
msgs[1].buf = read_buf;
if (i2c_transfer(state->adap, msgs, 2) != 2)
return -EREMOTEIO;
*lock = !(read_buf[0] & 0x10);
return 0;
}
static int
va1j5jf8007s_set_ts_id(struct va1j5jf8007s_state *state)
{
u32 ts_id;
u8 buf[3];
struct i2c_msg msg;
ts_id = state->fe.dtv_property_cache.isdbs_ts_id;
if (!ts_id)
return 0;
buf[0] = 0x8f;
buf[1] = ts_id >> 8;
buf[2] = ts_id;
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
return 0;
}
static int
va1j5jf8007s_check_ts_id(struct va1j5jf8007s_state *state, int *lock)
{
u8 addr;
u8 write_buf[1], read_buf[2];
struct i2c_msg msgs[2];
u32 ts_id;
ts_id = state->fe.dtv_property_cache.isdbs_ts_id;
if (!ts_id) {
*lock = 1;
return 0;
}
addr = state->config->demod_address;
write_buf[0] = 0xe6;
msgs[0].addr = addr;
msgs[0].flags = 0;
msgs[0].len = sizeof(write_buf);
msgs[0].buf = write_buf;
msgs[1].addr = addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = sizeof(read_buf);
msgs[1].buf = read_buf;
if (i2c_transfer(state->adap, msgs, 2) != 2)
return -EREMOTEIO;
*lock = (read_buf[0] << 8 | read_buf[1]) == ts_id;
return 0;
}
static int
va1j5jf8007s_tune(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params,
unsigned int mode_flags, unsigned int *delay,
fe_status_t *status)
{
struct va1j5jf8007s_state *state;
int ret;
int lock = 0;
state = fe->demodulator_priv;
if (params != NULL)
state->tune_state = VA1J5JF8007S_SET_FREQUENCY_1;
switch (state->tune_state) {
case VA1J5JF8007S_IDLE:
*delay = 3 * HZ;
*status = 0;
return 0;
case VA1J5JF8007S_SET_FREQUENCY_1:
ret = va1j5jf8007s_set_frequency_1(state);
if (ret < 0)
return ret;
state->tune_state = VA1J5JF8007S_SET_FREQUENCY_2;
*delay = 0;
*status = 0;
return 0;
case VA1J5JF8007S_SET_FREQUENCY_2:
ret = va1j5jf8007s_set_frequency_2(state);
if (ret < 0)
return ret;
state->tune_state = VA1J5JF8007S_SET_FREQUENCY_3;
*delay = (HZ + 99) / 100;
*status = 0;
return 0;
case VA1J5JF8007S_SET_FREQUENCY_3:
ret = va1j5jf8007s_set_frequency_3(state);
if (ret < 0)
return ret;
state->tune_state = VA1J5JF8007S_CHECK_FREQUENCY;
*delay = 0;
*status = 0;
return 0;
case VA1J5JF8007S_CHECK_FREQUENCY:
ret = va1j5jf8007s_check_frequency(state, &lock);
if (ret < 0)
return ret;
if (!lock) {
*delay = (HZ + 999) / 1000;
*status = 0;
return 0;
}
state->tune_state = VA1J5JF8007S_SET_MODULATION;
*delay = 0;
*status = FE_HAS_SIGNAL;
return 0;
case VA1J5JF8007S_SET_MODULATION:
ret = va1j5jf8007s_set_modulation(state);
if (ret < 0)
return ret;
state->tune_state = VA1J5JF8007S_CHECK_MODULATION;
*delay = 0;
*status = FE_HAS_SIGNAL;
return 0;
case VA1J5JF8007S_CHECK_MODULATION:
ret = va1j5jf8007s_check_modulation(state, &lock);
if (ret < 0)
return ret;
if (!lock) {
*delay = (HZ + 49) / 50;
*status = FE_HAS_SIGNAL;
return 0;
}
state->tune_state = VA1J5JF8007S_SET_TS_ID;
*delay = 0;
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
return 0;
case VA1J5JF8007S_SET_TS_ID:
ret = va1j5jf8007s_set_ts_id(state);
if (ret < 0)
return ret;
state->tune_state = VA1J5JF8007S_CHECK_TS_ID;
return 0;
case VA1J5JF8007S_CHECK_TS_ID:
ret = va1j5jf8007s_check_ts_id(state, &lock);
if (ret < 0)
return ret;
if (!lock) {
*delay = (HZ + 99) / 100;
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
return 0;
}
state->tune_state = VA1J5JF8007S_TRACK;
/* fall through */
case VA1J5JF8007S_TRACK:
*delay = 3 * HZ;
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
return 0;
}
BUG();
}
static int va1j5jf8007s_init_frequency(struct va1j5jf8007s_state *state)
{
u8 buf[4];
struct i2c_msg msg;
buf[0] = 0xfe;
buf[1] = 0xc0;
buf[2] = 0xf0;
buf[3] = 0x04;
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
return 0;
}
static int va1j5jf8007s_set_sleep(struct va1j5jf8007s_state *state, int sleep)
{
u8 buf[2];
struct i2c_msg msg;
buf[0] = 0x17;
buf[1] = sleep ? 0x01 : 0x00;
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
return 0;
}
static int va1j5jf8007s_sleep(struct dvb_frontend *fe)
{
struct va1j5jf8007s_state *state;
int ret;
state = fe->demodulator_priv;
ret = va1j5jf8007s_init_frequency(state);
if (ret < 0)
return ret;
return va1j5jf8007s_set_sleep(state, 1);
}
static int va1j5jf8007s_init(struct dvb_frontend *fe)
{
struct va1j5jf8007s_state *state;
state = fe->demodulator_priv;
state->tune_state = VA1J5JF8007S_IDLE;
return va1j5jf8007s_set_sleep(state, 0);
}
static void va1j5jf8007s_release(struct dvb_frontend *fe)
{
struct va1j5jf8007s_state *state;
state = fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops va1j5jf8007s_ops = {
.info = {
.name = "VA1J5JF8007 ISDB-S",
.type = FE_QPSK,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 1000,
.caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
},
.read_snr = va1j5jf8007s_read_snr,
.get_frontend_algo = va1j5jf8007s_get_frontend_algo,
.read_status = va1j5jf8007s_read_status,
.tune = va1j5jf8007s_tune,
.sleep = va1j5jf8007s_sleep,
.init = va1j5jf8007s_init,
.release = va1j5jf8007s_release,
};
static int va1j5jf8007s_prepare_1(struct va1j5jf8007s_state *state)
{
u8 addr;
u8 write_buf[1], read_buf[1];
struct i2c_msg msgs[2];
addr = state->config->demod_address;
write_buf[0] = 0x07;
msgs[0].addr = addr;
msgs[0].flags = 0;
msgs[0].len = sizeof(write_buf);
msgs[0].buf = write_buf;
msgs[1].addr = addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = sizeof(read_buf);
msgs[1].buf = read_buf;
if (i2c_transfer(state->adap, msgs, 2) != 2)
return -EREMOTEIO;
if (read_buf[0] != 0x41)
return -EIO;
return 0;
}
static const u8 va1j5jf8007s_prepare_bufs[][2] = {
{0x04, 0x02}, {0x0d, 0x55}, {0x11, 0x40}, {0x13, 0x80}, {0x17, 0x01},
{0x1c, 0x0a}, {0x1d, 0xaa}, {0x1e, 0x20}, {0x1f, 0x88}, {0x51, 0xb0},
{0x52, 0x89}, {0x53, 0xb3}, {0x5a, 0x2d}, {0x5b, 0xd3}, {0x85, 0x69},
{0x87, 0x04}, {0x8e, 0x02}, {0xa3, 0xf7}, {0xa5, 0xc0},
};
static int va1j5jf8007s_prepare_2(struct va1j5jf8007s_state *state)
{
u8 addr;
u8 buf[2];
struct i2c_msg msg;
int i;
addr = state->config->demod_address;
msg.addr = addr;
msg.flags = 0;
msg.len = 2;
msg.buf = buf;
for (i = 0; i < ARRAY_SIZE(va1j5jf8007s_prepare_bufs); i++) {
memcpy(buf, va1j5jf8007s_prepare_bufs[i], sizeof(buf));
if (i2c_transfer(state->adap, &msg, 1) != 1)
return -EREMOTEIO;
}
return 0;
}
/* must be called after va1j5jf8007t_attach */
int va1j5jf8007s_prepare(struct dvb_frontend *fe)
{
struct va1j5jf8007s_state *state;
int ret;
state = fe->demodulator_priv;
ret = va1j5jf8007s_prepare_1(state);
if (ret < 0)
return ret;
ret = va1j5jf8007s_prepare_2(state);
if (ret < 0)
return ret;
return va1j5jf8007s_init_frequency(state);
}
struct dvb_frontend *
va1j5jf8007s_attach(const struct va1j5jf8007s_config *config,
struct i2c_adapter *adap)
{
struct va1j5jf8007s_state *state;
struct dvb_frontend *fe;
u8 buf[2];
struct i2c_msg msg;
state = kzalloc(sizeof(struct va1j5jf8007s_state), GFP_KERNEL);
if (!state)
return NULL;
state->config = config;
state->adap = adap;
fe = &state->fe;
memcpy(&fe->ops, &va1j5jf8007s_ops, sizeof(struct dvb_frontend_ops));
fe->demodulator_priv = state;
buf[0] = 0x01;
buf[1] = 0x80;
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.len = sizeof(buf);
msg.buf = buf;
if (i2c_transfer(state->adap, &msg, 1) != 1) {
kfree(state);
return NULL;
}
return fe;
}
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